Device for removing end play from electric motors



June 12, 1951 M. E. BEEKER 2,556,489

DEVICE FOR REMOVING END PLAY FROM ELECTRIC MOTORS Filed March 28, 1949 Fig.

Inventor Man fwd E. Beelrer Patented June 12, 1951 DEVICE FOR REMOVING END PLAY FROM ELECTRIC MOTORS Manford E. Becker, Brookston, Ind.

Application March 28, 1949, Serial No. 83,814

This invention relates to new and useful improvements in electric motors and the primary object of the present invention is to provide an attachment for electric motors that will remove end play from the motor on which th same is applied.

. Another important object of the present invention is to provide an adjusting screw disposed in longitudinal alignment with a drive shaft and connected to the drive shaft through the medium of a bearing.

A further object of the present invention is to provide a device for removing end play from electric motors, that is quickly and readily applied to end bell of a motor and which is so constructed as to replace the end dust cap associated with the end bells of certain well known electric motors such as a Westinghouse motor.

Other objects and advantages reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming part hereof, wherein like numerals refer to like parts throughout, and in which;

Figure 1 is a fragmentary longitudinal vertical sectional view of an electric motor and showing the present invention in cross section applied thereto;

Figure 2 is an outside elevational view of the present invention, and;

Figure 3 is an inside elevational view of the present invention.

Referring now to the drawings in detail, wherein for the purpose of illustration, there is disclosed a preferred embodiment of the present invention, the numeral It represents a conventional well known type of electric motor, such as a century motor or any sleeve type motor as is used on the Frick air conditioning machine. The motor includes a drive shaft l2, a stop shoulder I4 on the drive shaft, a bearing sleeve [6 on the drive shaft abutting the stop shoulder, a bearing support 18 embracing the bearing sleeve, and an end bell 20 having an inner recess 22 and an outer recess 24.

The inner recess 22 receives the r d ced. Outer 2'Claims. (o1. ans-23a) portion 26 of the bearing support l8 in a manner well known in the art.

The present invention does not attempt to claim the above motor construction but is merely an attachment therefor that will remove end.

tioned in the recess 24 so that the inner face of the support 28 bears against the outer face of the hub for the end bell 20. I

, Thesupport 28 isprovid'ed with a plurality of circumferentially spaced internally threaded openings 32 that oppose the usual internally threaded recesses 34 in the hub of the end bell 20.

The support 28 is provided with a plurality of circumferentially spaced internally threaded openings 32 that oppose the usual internally threaded recesses 34 in the hub of the end bell 20.

Fasteners 36 are received in the openings 32 and recesses 34 and retain the support 28 relative to the end bell 20.

The support 28 is provided with an internally threaded central opening 38 that receivably engages an adjusting screw or threaded member 40 the inner end portion of which is formed with a concaved recess 42 that registers with a concaved recess 44 provided in one end of the drive shaft l2. A spherical element or ball 46 is received in the recess 42 and 44 and permits rotation of the drive shaft although the drive shaft and motor are held against end play by the fastener 40 and the mounting for the said fastener 40.

Means is provided for holding the adjusting member or fastener 40 against rotation once the same has been adjusted a predetermined amount, and this means comprises a lock nut 49 receivably engaging the member 40 and bearing against the outer face of the support 28.

It should be noted, that some types of motors, for example Westinghouse motors, are provided with end bells having dust caps secured thereto. The support 28 is thereof of a diameter and shape to replace the said dust caps and therefor functions as a support for the adjustin member as well as a closure or dust cap for the end bell.

Although the present invention has been illustrated and described as being detachably secured to the end bell, it is obvious that the same could be an integral part of the end bell during the construction of the latter without deviating from its intended function.

In view of the foregoing description taken in ing a drive shaft, a bearing sleeve -,about the..

drive shaft, a bearing support embracing the sleeve and having a reduced endporti'cinandran: end bell having a recess receiving the reduced, end portion of said support to retain the support and the .sleeve in position to the drive shaft, a' means for removing 'end play from r the motor comprising, a. plate detachably secured to'the end bell;.said"end*bell having" an opening in registry with the shaft "and "closed 'by-saidplate, said plate having athreaded aperture inregistry,with.the opening in saidehdbel'l and'said shaft, a..boltl threaded in said'apertureand disposed in longitudinal"alignment with the drive shaft; a lock nut tl1"readed*onsaidbolt'and contacting the'outer face of the plate; said'bolt' having a 'concaved -recess, and -a spherical 'ele-' mentreceived insaid concaved'recess, said drive' shaft'having an' outer end portionincluding a re.- cess also receiving said spherical element.

Kiln-combination with. an: electric motor having a drive shaft, a bearing sleeve about the drive shaft, a bearing support embracing the sleeve and having a reduced end portion and an end bell having a recess receiving the reduced end portion of said support to retain the support and the sleeve in position to the drive shaft and also having an opening in registry with the drive shaft, a means for closing the opening in the end bell and for removingv the endplayj from the motor comprising, a plate detachably secured to the end bell and havin a threaded aperture in registry with the opening in the end bell and also'in registry [With said shaft, a bolt threaded in said aperture and disposed in longitudinaL-alignment. with the drive shaft, a lock nut threaded on said bolt and contacting the outer face-0f 'the1piate' for retaining the bolt in iongitudinallyr adjusted position, said bolt having an inner'endincluding a concaved recess, said drive shaft also having a concaved recess in registry With the-concaved recess in-th'e-iiin'er end-of said bolt, and a spherical member seatedin said con caved recesses.

MAN FORD E5 BEEKER'J- REFERENCES CITED The followingreferences are of record in'the file of'this patent:

UNITEDSTATES PATENTS Number Name Date 509,739 Jacobs Nov. 28, 1893 705,839 Henderson July 2951902- 1,35'7,562 Hope Nov. 2, 1920 

